User blog comment:Danthemanb/Riddles/@comment-2231917-20100925013119

flip up one light switch wait a few seconds and then turn on and leave it on walk through the door, touch the two non lit light bulbs and feel the one thats hot, i remebered the lights so i know the one hot is the one i turned on first the one on is the second and the unlit one is the one i never turned on